<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=\, initial-scale=1.0">
  <title>Document</title>
  <!-- <script src="./vue.js"></script> -->

</head>
<body>
  
  <!-- 写模板 -->
  <div id="root">
    <p>{{ name }}</p>
    <p>{{ message }}</p>
  </div>

  <!-- 创建实例 -->
  <script>
    let app = new Vue({
      el: '#root',
      data: {
        name: '张三',
        message: '是个人'
      }
    })
    
    /* 第三步是挂载：vue.js已实现 */
  </script>
</body>
</html>